The invention relates to an access and starting management system (2) for a motor vehicle (1), comprising: - an electronic key (4); - a key reader (3), comprising a housing configured to receive the electronic key (4) and integrating a transponder antenna configured to read a code stored in a transponder device of the electronic key (4); - an immobilization device (22, 24); - a computer (20) configured to authenticate the code stored in the transponder device of the electronic key (4) when it is inserted in the key reader housing (3), and deactivate the immobilization device (22, 24 ) if the key is authorized. Figure for the abstract: Figure 1
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